Device for setting the shafts of saw-grinding machines



W. TOUPS.

DEVICE FOR SETTING THE SHAFTS 0F SAW GRINDING MACHINES.

APPLICATION FILED OCT. 16, I918.

Patented Apr. 20, 1921).

llhllTlE PATENT QFFICE.

1,337,293. Specification of Letters Patent.

Application filed Gctober 16, 1918.

i 0 all whom it may concern:

t kn wn that l, VJILPON ioUrs, a citita residing at Jeaneieria and State of d certain new and Devices for Setting hines, of w iich the following is a on The present inventi is device Ior set-- ting the sh" ts of saw g-Jinding machines.

Saw gr machi es embody in general, a l aving a face against which the blade of the saw to be ground is to be disposed, means for clamping the saw against the said face, a rotary shaft, and an emery whee mounted upon the shaft and arranged in the rotation of ti e shait, to upon the teeth of the saw, the a th shaft occupying substantially the sa; e plane as the said face of the bed of the machine. Unless provision is made for accu t l of the shaft, the emery wheel arricrl will act ur" on the teeth. l n for the en er wheel to act evenly i teeth it is essential that the axis f by which it ca midway between of the saw blame, and W1" ing when the shot has b proper position and -nless be adapted to be quickly present inventio-., therefor I its primary object the provision of devic v-which D may be readily applied to the emery wheel shaft hZLVHl been previously ad usted for the proper gage of saw blade, and which will, when bronght to position against the face of the bed of tie machine, accurately position the shaft so that its bear ngs may be tightened and the s left thus maintained at adjustment throughout the operation of sharpening the saw.

further obiect of the 1 vide device for the our may be readily man rally the use of any tools, which will o its construction and accurate in the ser- 2 7 L. rormance of its functions.

In the accompanying drawings: Fi 'ure 1 1s front elevation of the device b 'nventior is to pro- -G BINDING MACHINES.

Patented Apr. 20, 1920.

Serial No. 258,431.

embodying the present invention applied to the bed and emery wheel shaft of a saw awening machine of a well-known type;

" a perspective view of the device rein the inaclnne;

view illustrating diagrammatisaws;

F 1g. is a fragmentary perspective view of the head of the device and the adjustable bushing;

Fig. 5 is a view partly in side elevation and partly in vertical transverse section through the device;

Fig. 6 is a vertical front to rear sectional view illustrating one of the bearings for the emery wheel shaft.

in the drawings en bed of the machine in general by the numeral. 1 and Q; bed has a flat forward face 2 against is of the blade of the saw is to be disposed dining the operation of the machine, tl c said blade being clamped in place by pin;z device indicated in general by tie in mere as d which device 15 in the nature or a clamping aw adapted to be 'nto and out of coactive position with face 2 to clamp the saw blade. The of the nachine is indicated by the nu r and is of the ordinary construction and 'herefore need not be specifically dec Xccpt to state that the head embodies the usual aoiustable section 5 through the adgustment of which the emery wheel and its shaft are fed toward and from the or nns and fitted through slots 10 in the l brackets. This is, f course, only one of many types of bearings which might be provided for'the purpose, the sole requirement being a hearing which may be adiusted so as to position the axis of the shaft 6 in one of a number of planes parallel to the plane of the face 2 of the bed 1 of the machine, and, consequently, I am not to be limited to any particular type of bearing. Also it will be understood'that the machine may be a power driven machine or a hand driven machine and that the invention is applicable to substantially any of the ordinary types of saw sharpening machines upon the mari tet. As the particular type of machine illustrated in the drawings is a power driven ir-achinc, a belt pulley 11 is fixed upon the shart 6 for the application of power to the said shaft. The shaft 6 is inclined so that the enery wheel carried thereby will rotate in a plane at the proper angle to the toothed edge oi? the saw blade to act upon the teeth, and ad j acent its lower end the shaft 6 is provided with a collar 12 against which one tace ot' the emery wheel is to be disposed when the wheel is fitted onto this end of the shaft, a washer 13 being removably fitted onto the end of the shaft to bear against the opposite face of the emery wheel and being held in clamping engagement with the wheel by means of'a nut 14.

In order that the purpose of the invention may be more readily understood, there are illustrated in Fig. 3 of the drmvinos two saws, one indicated by he reference letter A and the other by the reference letter l3, and there are also illustrated diagrannnatically fragments or an emery wheel E, the teeth oi? the saws being indicated respectively by the reference letters A and B. Also in the said figure the axis of the en'zery wheel in each instance is indicated by the re nce letter X; It will be observed by re ace to this figure that the saw blade A is relatively thin being for example of standard gage No. 18, whereas the blade 13 i relatively thick and for example of the udard No. 2. In the case of the blade A which blade is clamped against the taco oi the bed 1 of the machine, the axis of the emery wheel E is in a plane directly mid ay be tween the planes of the side Faces of the said blade and consequently the periphery of the wheel will cut evenly in the throats oi the teeth. Therefore, the shaft of the emery wheel having been adjusted so that its axis will occupy the position shown in Fig. 3 and with relation to the blade A, no further adjustment will be required while the teeth. of that particular saw are being sharpened. However, if the next saw to be sharpened is of the greater thickness shown by the bide 13, it is evident that should no provision be made jor adjustment of the shaft, the axis X would be located in a vertical plane very close to that face of the blade contacting the face 2 of the machine bed but c uisideriibl remote from the plane occupied by the other face of the blade B. As a consequence the periphery oi the emery wheel would cut unevenly into the throats oi the teeth. It'is obvious, therefore, that in order to obtain a perfect cut, the emery wheel shaft should rately gaging this adjustment, it would be a dillicult matter to properly position the shaft, and as before stated, the primary object of the present invention is to provide such means and this means will now be described.

The device embodying the pres nt invention includes acircular head 15 of any desired dimensions and "formed axially with a circular opening 16. into this opening there is snugly and yet rotatably fitted a bushing 17 the opening or bore of which, indicated by the numeral 18, is ofi 'set from the true axis or the head and bushing and eccentrically positioned with relation to the circumference of the bushing which round to fit the opening. A stud i9 exten radially from the circumference oi the bus 1 ing 17 at or near one end thereof and pro?- erably at a point opposite the thickest portion of the wall of the bushing r, in other words, at a point the most remote from toe axis of the opening 18. in order that the various positions ofrotative adjustment of the bushing 17 may be determined and in order that the bushing may be held againstrotation when brought to the desired position of adjustment, the face of the head 15 is lora'ied radial to the openi l2 16 with an arcuate series of seats 20 to rec 1 19. The purpose or the bushing 1 a adjustment will presently be fully set iorth.

l5xtending;- 1st, tially radially trot-in th periphery of the head 15 is a shanlr 35 which adjacent its point of juncture with the head is increased in width and of sub stantially circular form to provide a sv lve head 22, the shank being continued beyond this head in alineinent with its portion 21. as indicated by the numeral a By refer ence to Fig. 5 it will be observed that one face of the head '22, the shanlr 21, and the extension of th shank occupies a pane directly radial to the axis or the head 15. The head portion 99 o i the shanlrQl is recessed at the opposite face of the shank, as indicated by the numeral Qtto rot-atablv receive a substantially circular enlarger eii 25 constituting the other head of the snare joint, this enlargement being'iorined in l way between the ends oi? the stock of the device, which stock is indicated. by the numeral 26. The stock itself at the point of location of the swivel head 25 is'also reacc ssed in its face so that whenthe heads 22 and 5 of the drawings, the engaging face of the stock, indicated by the numeral 27, will occupy the same plane as the faces of the shank portions 21 and 23 and the face of the swivel head P'referably the opposite face of the stock 26 is formed with a longitudinally extending reinforcing rib 28 and fitted axially through .the heads 22 and and through the corresponding portion of the rib 28 is a swivel bolt 29 the head 30 of which is countersunk in the face of the head a wing nut 31 being applied to the 0pposite end of the bolt and bearing against the outer edge of the rib 28. It will now be uncerstood that the head 15 and its stem may be swung about the bolt 29 to assume various positions of angular adjustment with relation to the stock 26 and in order that such positions of adjustment may be relatively determined in degrees, an indicating mark 32 is preferably made upon the face of the portion 23 of the stem 21 and radial degree marks, suitably designated, and indicated in the drawings by the numeral 33, are made upon the face of the head 25 and are designed, in the relative angular adjustment of the parts to register with the mark 82.

In the use of the device the gage of the saw to be sharpened having been determined, the bolts 9 of the bearings 7 are loosened, the emery wheel removed from the shaft 6 by removing the nut 1d and the w ner 13. Next, the bushing 17 is slid longitudinally within the opening 16 of the head 15 in which the seats 20 are formed and rotated within the head 15 until its stud is opposite the properly designated seat. The bushing is then slipped within the opening to engage its stud in the said seat. The head is then arranged upon the shaft 6 to occupy the position formerly ccupied by the emery wheel, by slipping the bushing 1'? onto the end of the shaft. Then, either after or without the application of the washer 13 and nut 14:, the flat face 2'? of the stock 26 together with the faces of the shank portions 21 and 28 and head 22 occupying the same plane as the said face 2?, are brought flatly and snugly against the face 2 of the bed of the machine and held firmly in place until. the nuts 9 of the bearings 7 have been tightened. After these nuts have been tightened, thus fixing the bearings in their positions of adjustment, the head 15 is deta hed from the spindle and the emery wheel is then replaced in position, where upon the machine is ready for operation.

As before stated, the shank 21 is mounted for swinging adjus ment upon the stock so that the device may be employed upon both left and right hand grinding machines, both types of machines, as is well known, being in general use.

Having thus described the invention, what is claimed as new is:

1. In a device of the class described, a stock having a plane abutment face, a head carried by the stock and having an opening he axis of which occupies the same plane as the said face of the stock, and a bushing adjustably fitted in the opening and provided with an eccentrically positioned shaft receiving opening.

2. In a device of the class described, a stock having a plane abutment face, a head carried by the stock and angularly adjustable thereon and having an opening the axis of which occupies the same plane as the said face of the stock, and a bushing rotatably fitted in the opening and provided with an eccentrically positioned shaft receiving opening.

3. In a device of the class described, a stock having a plane abutment face, a head arried by the stock and disposed in a plane transversely of said face, and a bushing rotatably carried by the head and provided with an eccentrically positioned shaft receiving opening, rota tion of the bushing serving to vary the position of the axis of its opening with relation to the plane of. the said face of the stock.

ff. In a device of the class described, a stock having a plane abutment face, a head carried by the stock, a bushing having a shaft receiving opening whose axis is eccentric to its periphery, said bushing and head being provided with interengaging arts for rotatably supporting the bushing with its true axis in the plane of the said abutment face of the stock.

5. A. device of the class described including an element having a plane face, a support intersecting said plane and attached to said element, a bushing having a circular exterior and a shaft opening eccentric there to, said support and bushing being provided with interengaging parts for adj ustably mounting the bushing on the support with its true axis coincident with said plane.

6. In a device of the class described, a stock having a plane abutment face, a head carried by the stock and having an opening whose axis occupies the same plane as said face, and a round bushing rotatable in said opening and provided with a bore eccentric to its periphery.

In testimony whereof I afiix my signature.

WILSON TOUPS. [n s] 

